Miner s expanding drill



(No Model.)

H. M. SOULON.

MINBRS EXPANDING DRILL.

Patented Nov., 16, 1897.

UNITED STATES PATENT OFFICE.

I-IoNoRAT M. soULoN, or oDIN, ILLINOIS.

MNERS EXPANDING DRILL.

SPECIFICATION forming part of Letters Patent No. 593,617, dated November16, 1897.

Application led March 13, 1897. Serial No. 627,819. (No model.)

.To a/ZZ whom t may concern.-

Beit known that I, HONORAT'M. SoULoN, a citizen of the United States,residing at Odin, in the county of Marion and State of Illinois, haveinvented certain new and useful Im- .provements in Miners ExpandingDrills; and

I do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the gures of reference marked thereon,which form a part of this specification.

vMy invention relates to an expanding drill or reamer for the use ofminers; and its object is to provide a tool by means of which the innerend of a drilled hole Ycan be repaired or enlarged,formin g a pocketfor-powder or other explosive material, whereby more efficient resultscan be obtained than when the blast takes place in a hole ofthe samediameter throughout.

The invention consists in the novel con-V struction and combination ofparts hereinafter fully described and claimed. v

In the accompanying drawings,l5 `igure lisa side elevation View of atool constructed in accordance with my invention. Fig. 2 is a centrallongitudinal section of the same. Fig. 3 is a section on line 0c, Fig.2.

In the said drawings the reference-numeral 1 designates a tube or hollowrod provided near its lower end with two diam etric slots 2, throughwhich project reamers or cutters 3, the inner ends of which are pivotedto a vertically-movable rod 4.. Near its upper end,

this rod is provided with diametric outwardlyextending pins 5, whichproject through a slot 6 inthe tube 1. Loosely mounted on said tubebetween the upper and lower pins are washers 7, and between thesewashers is a lever 8, provided near its center with oppositelycurvedarms integral therewith, forming a ring which encircles the said tubeand is movable vertically thereon. One end of the lever is pivotedl'toan arm 9, formed with a half-round bearing 10. A similarly-formedbracketV 12 is connected with this arm by bolts 13 for securing the armto the tube. This bracket and bearing are conined between two collars14., secured to the tube. A coiled spring l5 is interposed between thepins 5 and the upper end of the tube for depressing the rod 4.

The operation is as follows: A hole to receive a blasting charge isdrilled in the usual manner. The rod 4 is elevated by the lever 8drawing the reamers or cutters into the tube, and the latter is theninserted in said hole, and when the tube reaches the bottom the lever 8will by the spring 15 be depressed, so as to force cutters or reamers 3outward. By now rotating or oscillating the tube the cutters will reamout and enlarge the inner end of the hole, forming a pocket to receive ablasting charge. By thus enlarging the hole a quantity of powder connedtherein will exert considerably more force than a similar charge in ahole of the same diameter throughout.

Having thus fully described my invention, what I claim is Thecombination with the tube having dia- Inetric slots at its upper andlower ends, of the vertically-movable rod, the reamers pivoted theretonear the lower end and projecting through the slots in the lower end ofthe tube, the pins projecting through the slots in the upper end of saidtube, the coiled spring, the washers confined between said pins, thelever formed with a central ring encircling said tube between thewashers and the arm secured to the tube to which said lever is" pivoted,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HONORAT M. SOULON.

